Optical signal transmission device based on multi-channel splitter

Abstract

The utility model discloses an optical signal transmission device based on a multichannel splitter. The optical signal transmission device comprises a light source layer, a splitting layer, a transmission layer and a receiving layer which are electrically connected in sequence, the light source layer is used for emitting light signals; the branching layer is used for uniformly branching optical signals with different wavelengths through a multi-channel branching device; the transmission layer is used for shortening the length of a transmission path and reducing insertion loss; the receiving layer is used for photoelectric conversion, signal demodulation and signal receiving; according to the scheme, an ASE light source emits an optical signal, the optical signal is transmitted to a multi-channel splitter through a 48-core MT connector, the optical signal is transmitted to a 24-core MT connector after the optical signal is uniformly split by the multi-channel splitter, and finally the optical signal is sequentially transmitted to a spectrometer and a photoelectric converter through the 24-core MT connector. The photoelectric converter converts the optical signal into an electric signal, outputs the electric signal to the demodulation module for demodulation processing, and finally displays the electric signal in the PC terminal; according to the scheme, a complex system for multi-path transmission of optical signals can be simplified, so that the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technical field, concretely relates to a kind of optical signal transmission device based on multi-channel shunt. BACKGROUND

[0002] The background development of optical signal transmission can be traced back to the exploration of the physical properties of light in the 19th century. Its core principle is based on the total internal reflection of light. In 1841, scientists verified the law of total internal reflection of light in medium through experiments. However, it was not until the 1960s that optical communication entered the practical stage with the breakthroughs in laser and optical fiber materials. In 1966, Corning successfully developed low-loss quartz optical fiber, combined with the commercialization of semiconductor lasers, opening a new era of long-distance signal transmission.

[0003] Traditional optical signal transmission technology is mainly based on fiber-optic communication. According to the difference in transmission mode, it can be divided into single-mode optical fiber (core diameter 9-10 μm) and multi-mode optical fiber (core diameter 50 / 62.5 μm). Single-mode optical fiber supports long-distance transmission (>200 km) through a single path, while multi-mode optical fiber adapts to short-distance high-bandwidth requirements (<2 km) through multi-path transmission. Early optical sources used light-emitting diodes (LEDs). Later, they were gradually replaced by semiconductor lasers to achieve higher transmission rates and stability.

[0004] However, the optical signal transmission method based on fiber-optic communication has great limitations. First of all, it has high cost and relatively complex installation process, requiring professional technology and equipment. Optical fiber has low tolerance to bending and stretching, making it unsuitable for some special scenarios with twists and high mechanical stress.

[0005] For the transmission of multiple optical signals, wavelength division multiplexing can be used to achieve single-fiber capacity multiplication by transmitting different wavelengths of optical signals in the same optical fiber in parallel. Multi-core optical fiber can also be used to achieve this, with 7-19 cores integrated into a standard cladding, each transmitting independently.

[0006] The above-mentioned methods for optical signal transmission all have the problems of high cost, high implementation difficulty, and low stability. INVENTION CONTENTS

[0007] To overcome the above-mentioned deficiencies of the prior art, the utility model provides an optical signal transmission device based on multi-channel shunt with low cost and good stability.

[0008] To achieve the above-mentioned purposes, the utility model employs the following technical solutions:

[0009] Provided is an optical signal transmission device based on a multi-channel splitter, comprising, in sequence, an optical source layer, a splitting layer, a transmission layer, and a receiving layer; the optical source layer is used to emit optical signals; the splitting layer uniformly splits optical signals of different wavelengths through a multi-channel splitter; the transmission layer is used to shorten the transmission path length and reduce the insertion loss; and the receiving layer is used for photoelectric conversion, signal demodulation, and signal reception.

[0010] Further, the optical source layer is an ASE light source with a wavelength of 1550 nm.

[0011] Further, the splitting layer respectively inputs and outputs optical signals through a 48-core MT connector and a 24-core MT connector, and the 48-core MT connector and the 24-core MT connector are connected through a multi-channel splitter supporting dynamic adjustable wavelength distribution.

[0012] Further, the 48-core MT connector and the 24-core MT connector are both injection molded parts made of ceramic or resin materials.

[0013] Further, the transmission layer is an optical spectrometer matched with the 24-core MT connector, and the optical spectrometer is loaded with an open source library for facilitating data processing.

[0014] Further, the optical spectrometer further comprises a photodetector array, and the photodetector array is a dual-channel architecture and is used for automatically switching to a backup channel when a single-channel fault occurs.

[0015] Further, the receiving layer comprises, in sequence, a photoelectric converter, a demodulation module, and a PC end.

[0016] Further, the photoelectric converter comprises a Vishay VCSEL array and an InGaAs PIN detector.

[0017] Further, the demodulation module is integrated with an FPGA and is automatically calibrated and parameter configured through a pre-programmed IP core.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. The scheme can simplify the complex system of optical signal multi-channel transmission, thereby reducing the cost, and the input and output of the multi-channel splitter can be customized according to needs, meeting various possible application scenarios.

[0020] 2. The scheme transmits optical signals emitted by an ASE light source to a multi-channel splitter through a 48-core MT connector, uniformly splits the optical signals through the multi-channel splitter, transmits the optical signals to a 24-core MT connector, and finally transmits the optical signals to an optical spectrometer and a photoelectric converter in sequence through the 24-core MT connector, the photoelectric converter converts the optical signals into electrical signals and outputs the electrical signals to a demodulation module for demodulation processing, and finally displays the signals on a PC end. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is a structural diagram of the optical signal transmission device of the scheme.

[0022] Fig. 2 It is a first structural diagram of the multi-channel splitter.

[0023] Fig. 3 It is a second structural diagram of the multi-channel splitter.

[0024] Fig. 4 It is a wiring schematic diagram of the multi-channel splitter.

[0025] Wherein, 1, ASE light source, 2, 48-core MT connector, 3, multi-channel splitter, 4, 24-core MT connector, 5, optical spectrum analyzer, 6, photoelectric converter, 7, demodulation module, 8, PC end, 9, input channel, 10, output channel. DETAILED DESCRIPTION

[0026] The specific embodiments of the utility model are described below, so that the person skilled in the art can understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific embodiments, for the person skilled in the ordinary skill in the art, as long as various changes are within the spirit and scope of the utility model defined and determined by the appended claims, these changes are obvious, all the utility model creations using the utility model concept are within the scope of protection.

[0027] As Figs. 1 to 4 Indicated, the optical signal transmission device of the scheme based on multi-channel splitter includes light source layer, shunt layer, transmission layer and receiving layer connected in sequence.

[0028] The light source layer is used for emitting optical signals; specifically, the light source layer is an ASE light source 1 with a wavelength of 1550nm, the model number is Thorlabs LFC-1550, and it has the characteristics of low cost and low noise.

[0029] The shunt layer is used for uniform shunting of optical signals of different wavelengths; specifically, the shunt layer respectively inputs and outputs optical signals through 48-core MT connectors 2 and 24-core MT connectors 4, which are of the Mouser NKK type and have low unit prices; the 48-core MT connectors 2 and the 24-core MT connectors 4 are connected through a multi-channel shunt 3 that supports dynamic adjustable wavelength distribution; the 48-core MT connectors 2 and the 24-core MT connectors 4 are both injection-molded parts made of ceramic or resin materials, replacing metal shells to reduce weight and cost; the multi-channel shunt 3 can realize 48-24 channel shunting, including three input channels 9 and seventeen output channels 10, and transmits optical signals; the optical fiber serpentine wiring (bending radius > 5 mm) in the shunt has a control path length < 15 cm, an insertion loss ≤ 3 dB, and a channel isolation > 30 dB; the scheme can also use LightTools to simulate the 48→24 core conversion process and optimize the fiber arrangement to control crosstalk.

[0030] The transmission layer is used to shorten the transmission path length and reduce the insertion loss; specifically, the transmission layer is an optical spectrometer 5 matched with the 24-core MT connector 4, which has a resolution of 0.1 nm; the optical spectrometer 5 is loaded with an open-source library such as Python SciPy to facilitate data processing, thereby reducing algorithm development costs; the optical spectrometer 5 also includes a photodetector array with a response speed ≥ 1 GHz to meet the high-speed signal acquisition requirements, and the photodetector array is of a dual-channel architecture and is used for automatic switching to a backup channel when a single-channel fault occurs.

[0031] The receiving layer is used for photoelectric conversion, signal demodulation, and signal reception; specifically, the receiving layer includes, in sequence, a photoelectric converter 6, a demodulation module 7, and a PC end 8; the photoelectric converter 6 includes a Vishay VCSEL array and an InGaAs PIN detector and is integrated and packaged; the demodulation module 7 integrates an FPGA and performs automatic calibration and parameter configuration through a pre-programmed IP core, thereby eliminating the hardware debugging link.

[0032] In summary, the scheme can simplify the optical signal multi-channel transmission complex system, thereby reducing costs, and the inputs and outputs of the multi-channel shunt 3 can be customized as needed, the wire sequences of the 48-core MT connectors 2 and the 24-core connectors can be customized as needed, and the wiring relationship of the 48-core MT connectors 2 and the 24-core connectors can be customized as needed, thereby meeting various possible application scenarios.

Claims

1. A multi-channel splitter based optical signal transmission apparatus, characterized by, The light source layer, the shunt layer, the transmission layer and the receiving layer are sequentially and electrically connected; The light source layer is used for emitting optical signals; The shunt layer uniformly shunts optical signals of different wavelengths through a multi-channel shunt; The transmission layer is used for shortening the transmission path length and reducing the insertion loss; The receiving layer is used for photoelectric conversion, signal demodulation and signal receiving.

2. The multi-channel splitter based optical signal transmission apparatus according to claim 1, wherein, The light source layer is an ASE light source with a wavelength of 1550 nm.

3. The multi-channel splitter based optical signal transmission apparatus according to claim 2, wherein, The shunt layer respectively inputs and outputs optical signals through a 48-core MT connector and a 24-core MT connector, and the 48-core MT connector and the 24-core MT connector are connected through a multi-channel shunt supporting dynamic adjustable wavelength distribution.

4. The multi-channel splitter based optical signal transmission apparatus according to claim 3, wherein, The 48-core MT connector and the 24-core MT connector are both injection molded parts made of ceramic or resin materials.

5. The multi-channel splitter based optical signal transmission apparatus according to claim 3, wherein, The transmission layer is an optical spectrometer matched with the 24-core MT connector, and the optical spectrometer is loaded with an open source library for facilitating data processing.

6. The multi-channel splitter based optical signal transmission apparatus according to claim 5, wherein, The optical spectrometer further comprises a photodetector array, and the photodetector array is a double-channel architecture and is used for automatically switching to a backup channel when a single-channel fault occurs.

7. The multi-channel splitter based optical signal transmission apparatus according to claim 6, wherein, The receiving layer comprises a photoelectric converter, a demodulation module and a PC terminal which are sequentially and electrically connected.

8. The multi-channel splitter based optical signal transmission apparatus according to claim 7, wherein, The photoelectric converter comprises a Vishay VCSEL array and an InGaAs PIN detector.

9. The multi-channel splitter based optical signal transmission apparatus according to claim 7, wherein, The demodulation module is integrated with an FPGA, and is automatically calibrated and parameter configured through a pre-programmed IP core.

Images